[bug #64797] Pathalogically slow statting with .SECONDARY

[David Given]

URL:
  <https://savannah.gnu.org/bugs/?64797>

                 Summary: Pathalogically slow statting with .SECONDARY
                   Group: make
               Submitter: hjalfi
               Submitted: Thu 19 Oct 2023 10:12:06 PM UTC
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 4.3
        Operating System: POSIX-Based
           Fixed Release: None
           Triage Status: None


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Follow-up Comments:


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Date: Thu 19 Oct 2023 10:12:06 PM UTC By: David Given <hjalfi>
I have a weird edge case where a makefile (generated by a build tool) is
taking literally minutes to stat all the files and start execution. I boiled
it down to the presence of .SECONDARY: if I remove this, it starts more or
less instantly. If I run it with strace I can see that it stats a whole bunch
of files very quickly, and then starts taking a couple of seconds for each
file (all these files don't exist).

I've attached a test case.

```
$ time make
make: *** No rule to make target 'src/fluxengine.cc', needed by
'.obj/src+fluxengine/src/fluxengine.cc/fluxengine.o'.  Stop.

real    3m46.112s
user    3m46.112s
sys     0m0.000s
```

It turns out that .SECONDARY is useless for my makefile anyway, so removing it
fixes the problem for me, but this still seems very wrong.

This is on make 4.3 on Debian Linux. I've tried 4.2 and it behaves the same
way there.






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File Attachments:


-------------------------------------------------------
Date: Thu 19 Oct 2023 10:12:06 PM UTC  Name: bad.tar.xz  Size: 8KiB   By:
hjalfi

<http://savannah.gnu.org/bugs/download.php?file_id=55260>

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